Lubricant compressor



vJan. 10, 1928.

` E. PIQUEREZ LUBRICANT COMPRESSOR .Filed April l5, 1925 m m M Patented Jan. V10, 1928.

UNITED STATES EMILE PIQUEREZ, l' PARIS, FRANCE, ASSIGNOB T0 THE BASSICX MANUFAC'IUBDIG PATENT OFFICE.

COMPANY, 0F CHICAGO, ILLINOIS, A COBIQBATION 0F DELAWARE.

LUBBICANT comrnrzssoa.

Application ll'ed April 1li, 1925, Serial No.

tained by pulling on the reservoir, and ad mission by automatic return of the reservoir `under the action of a spring stretched or 1 compressed during the preceding stroke.

vThe compression means is co-axial with the reservoir and may be positioned inside or outside thesame.

In the accompanying drawings, which illustrate two embodiments of compressors according to the invention Fig. 1 is a longitudinal section of one embodiment .with the compression means inside the reservoir.` l

Fig. 2 is a longitudinal section of an alternative construction with the compression means outside the reservoir. y v In the embodiment of the invention selected for illustration in Fig. 1, the apparatus comprises a'lubricant reservoir 1, closedv at its bot-tom by a cap 2, which may be 'of drawn sheet metal, the same as the reservoir, the coupling being made so that the cylindrical interior cavities of the same diameter 3Q will be prolongations of each other. Piston 3 inside the reservoir comprises a cup leather held between the metallic clamping .plates 4 and 5. The ring 5 rests on a shoulder on the body 6 of the'small compression cylinder,

which has athreaded elongation 6 threaded into the center of the plate 4. Bod 6 haa` a bore 7 -throughout part of its lengt of the same diameter as the full size piston 8, which piston is provided with a cylindrical extension`8 of smaller diameter slidable in the bore 62 at the bottom of body 6. The annular space between the inner wall lof bore 7 and the rod 8 communicates with reservoir 1 by lateral ports 9, of which two are illustrated, and with theexitchamber 10 pro-` vided in axial elongation 8 of the piston by the transverse-conduit 11.

Check valveV means, such as ball valve 12,

controls the passage of lubricant. from conduit 11 to chamber 10, the spring for the ball bearing on the end of a rod 13, continuing the extension 8', in which it may be fastened by screw threads, said rod being I also a good sliding titV in the bore 6. Rod 13.A

23,282, ena 1n rranee september 26,1924.

.contains a central conduit 13', discharging sealing sleeve 16 positioned in the tubular.

portion of the bottom voi. reservoir 1 and clamped in place by a threaded cap 17.

On the remote end of the full size piston 8 there is fastened, as b threading it in place, a cap 18 against wich abuts the upper end of a spring 19 bearing at its other end on the boss of the plate 4.

The operation :is as follows:

The parts being in the position shown in Fig. 1, lubricant iills the space below piston 3 in the reservoir and the annular chamber 7. The operator may hold tube 14 with one hand and with the other pull reservoir 1. towards himself, slidingit on the tube. The lubricant is thus compressed between the reservoir bottom and the piston 3 and builds up the same pressure in the annular s ace 7. As soon `as this pressure is equal to t e tension of spring 19, the latter will yield, and as the movement continues cylinder 6 will slide on plston 8 to cover the ports 9 so that the lubricant, compressed in the small annular space 7 of decreasing volume, will finally pass out into chamber 10 when its pressure is suiicient to push back the ball 12. The operator can now let the reservoir come for-- ward again under the action of spring 18. The empty space 7 developed by the displacement of the cylinder body 6 will ll itself with lubricant when ports 9 are uncovered, and the cycle is complete.

In the embodiment of Fig. 2, the apparatus comprises a one-piece reservoir 1 with its bottom apertured to form an air vent 1 to let air come in to the `upper face of the thick follower 3, preferably of wood, which can thus remain in contact with the body of lubricant. At itslower end the reservoir is threaded to engage the lip 20 of the body ..6 of the compression cylinder, a tight joint being assured by a packing 21 positioned in .a groove in body 6 for this purpose. As in the preceding embodiment, this body-has the upper bore 7, of the same diameter asv piston 8, communicating with the reservoir b oblique ports 9. Piston 8 is provided with the extension 8 -slidin in the bore 62 at the bottom of the cylin er, and having the transverse conduit 11 and chamber 10 with the ball valve 12. Rod 13, continuing extention 8', is threaded into a sleeve 22 for 63 machined at the end of body 6.

The operation is as follows:

The parts being in the position of Fig. 2, lubricant lills the annular space 7. On displacement of reservoir 1, spring 23 stretches,

ody 6 slides onvthe guide rod 13 and piston 8 to cover ports 9. On further movement, the lubricant is compressed in the annular space 7 and Hows out through conduit 11, chamber 10 and passage 13. The reservoir mayl then be allowed to return under the action of spring 23. As body 6 moves down, it creates a suction in space 7 which will fill with lubricant as soon as ports 9 are uncovered, and the cycle is complete.

Without further elaboration, the foregoing I will so fully explain the gist-of the invention, that others may, by applying current knowledge, readily adapt the same for use under various conditions of service without eliminatinv certain features which may properly be sa1d to constitute the essential items of novelty involved, which items are intended to be deined and secured by the following claims.

LI claim:

1. A lubricant compressor comprising a reservoir, a coupling, an extensible connection between the two, and pump means inside of the reservoir actuated by relative movement of the reservoir and coupling for compressing lubricant, said pump means comprising an annular piston in said reservoir, a small cylinder centrally located at the axis of said piston, a high pressure piston in said small cylinder, said small cylinder having inlet ports uncovered by said high pressure piston at one end of its stroke, said high pressure piston projecting beyond the end of said small cylinder, an enlargement on the end of `said high pressure piston, and a compression spring abutting said enlargement and saidns'mall cylinder and resiliently holding them with the ports uncovered.

2. A lubricant compressor comprising a reservoir, a coupling, an extensible connection between the two, and pump means inside of the reservoir actuated by relative movement of the reservoir and coupling for compressing lubricant, said pump means comprising an annular piston in said reservoir, a small cylinder centrally located at the axis of said piston, a high pressure piston in said small cylinder, said small cylinder having inlet ports uncovered by said high pressure piston at one end of its stroke, said high pressure pistonprojecting beyond the end of said'small cylinder, an enlargement on the end of said high pressure piston, and a. spring engaging said enlargement and said smail cylinder and resiliently holding them lwith the ports uncovered.

3. A lubricant compressor comprising a reservoir, a coupling, an extensible connection between the two, and pump means inside of the reservoir actuated by relative movement of the reserv ir and coupling for compressing lubricant, said pump means comprising an annular iston in said reservoir, a small cylinder ce. trally located at the axis of said piston, a hih pressure piston in said small cylinder, sa'd small cylinder having inlet portsv uncovered by said high pressure piston at one end'of its stroke, said high pressure piston projecting beyond the end of said small cylinder, and a spring engaging said high pressure piston and said small cylinder and resiliently holding them with the ports uncovered.

4. A lubricant compressor comprising a reservoir, a coupling, an extensible connection between the two, and pump means inside of the reservoir actuated by relative -movement of the reservoir and coupling for reservoir, a coupling, an extensible connec-.

tion between the two, and pump means inside of the reservoir actuated by relative movement of the reservoir and coupling for compressing lubricant, said pump means comprising an annular piston in said reservoir, a small cylinder centrally located at the axis of said piston.l and a high pressure piston in sai'd small cylinder.

6. A lubricant compressor comprising a reservoir, a coupling, an extensible connection between the two, and pump means inside of the reservoir actuated by relative movement of the reservoir and coupling for compressing lubricant, said pump means comprising an annular piston in said reservoir, a small cylinder centrally located at the axis of said piston, a high pressure piston in said small cylinder, a rigidA connection between said high pressure piston and said coupling, and a resilient connection between sald high pressure piston and its cylinder.

7. A lubricant compressor comprising a reservoir, a coupling, an extensible connection betweenv thetwo, and pump means inside of the reservoir actuated by .relative movement of the reservoir and coupling for compressing lubricant, said pump mea-ns Las B comprising a piston in said reservoir,` a small for actuating both compressing means by exv cylinder centrally located at the axis of said Aei'ting tension on said discharge conduit. 15

' n piston, a high pressure piston in fsaidfsmall 9. A lubricant compressor comprising a Y cylinder, and transmission means',fa'ctingiii'yv A reservoir, a discharge conduit movable to- 5 draulicallythrough pressure in the material' ward and away from said reservoir, low in said reservoir, for producing relative pressure and high pressure compressing movement between said piston and cylinder. means connected in series, and means Ifor 2o 8. A lubricant compressor comprising low actuating both compressing means by mov- `pressure means including a cylinder eleing said conduit away from said reservoir.

10 ment and a piston element, high pressure In witness whereoffI hereunto subscribe compressing means fed by said low pressure my name, this 23d dayl of March, 1925. v means, a discharge conduit for said high v p c pressure compressing means,and connections v EMILE PIQUEREZ. 

